/**
 * Copyright 2010-present Facebook.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.facebook.internal;

import com.facebook.Settings;

import java.util.Collection;

/**
 * com.facebook.internal is solely for the use of other packages within the Facebook SDK for Android. Use of
 * any of the classes in this package is unsupported, and they may be modified or removed without warning at
 * any time.
 */
public final class ServerProtocol
{
  private static final String DIALOG_AUTHORITY_FORMAT = "m.%s";
  public static final String DIALOG_PATH = "dialog/";
  public static final String DIALOG_PARAM_ACCESS_TOKEN = "access_token";
  public static final String DIALOG_PARAM_APP_ID = "app_id";
  public static final String DIALOG_PARAM_AUTH_TYPE = "auth_type";
  public static final String DIALOG_PARAM_CLIENT_ID = "client_id";
  public static final String DIALOG_PARAM_DISPLAY = "display";
  public static final String DIALOG_PARAM_E2E = "e2e";
  public static final String DIALOG_PARAM_LEGACY_OVERRIDE = "legacy_override";
  public static final String DIALOG_PARAM_REDIRECT_URI = "redirect_uri";
  public static final String DIALOG_PARAM_RESPONSE_TYPE = "response_type";
  public static final String DIALOG_PARAM_RETURN_SCOPES = "return_scopes";
  public static final String DIALOG_PARAM_SCOPE = "scope";
  public static final String DIALOG_REREQUEST_AUTH_TYPE = "rerequest";
  public static final String DIALOG_RESPONSE_TYPE_TOKEN = "token";
  public static final String DIALOG_RETURN_SCOPES_TRUE = "true";

  // URL components
  private static final String GRAPH_VIDEO_URL_FORMAT = "https://graph-video.%s";
  private static final String GRAPH_URL_FORMAT = "https://graph.%s";
  private static final String REST_URL_FORMAT = "https://api.%s";
  public static final String REST_METHOD_BASE = "method";
  public static final String GRAPH_API_VERSION = "v2.0";

  private static final String LEGACY_API_VERSION = "v1.0";

  public static final Collection<String> errorsProxyAuthDisabled =
      Utility.unmodifiableCollection("service_disabled", "AndroidAuthKillSwitchException");
  public static final Collection<String> errorsUserCanceled =
      Utility.unmodifiableCollection("access_denied", "OAuthAccessDeniedException");

  public static final String getDialogAuthority()
  {
    return String.format(DIALOG_AUTHORITY_FORMAT, Settings.getFacebookDomain());
  }

  public static final String getGraphUrlBase()
  {
    return String.format(GRAPH_URL_FORMAT, Settings.getFacebookDomain());
  }

  public static final String getGraphVideoUrlBase()
  {
    return String.format(GRAPH_VIDEO_URL_FORMAT, Settings.getFacebookDomain());
  }

  public static final String getRestUrlBase()
  {
    return String.format(REST_URL_FORMAT, Settings.getFacebookDomain());
  }

  public static final String getAPIVersion()
  {
    if (Settings.getPlatformCompatibilityEnabled())
    {
      return LEGACY_API_VERSION;
    }
    return GRAPH_API_VERSION;
  }
}
